Washington State Department of Transportation

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Lowering the SR 99 tunneling machine’s front end back into the access pit

Seattle Tunnel Partners (STP) has reconnected the SR 99 tunneling machine’s 2,000-ton front end to the section that remained in the access pit during repairs. With the two sections of the machine now bolted together, crews from Mammoet have unhooked the front-end piece from the massive red crane that performed last week’s lift.